I was 13, and I didn't really use it unless I needed a ride.
It was a standard blah phone.
I'm really against kids having phones young.
The 10 year old that I tutor has one, and all he does is brag about it and play his ringtones. It's one of THE most annoying things.
My little sisters are 10, and they beg for phones non-stop.
But I'm completely with my parents on this issue. They won't get them until they're 12 or 13, at the earliest.